CN105404136A - Radio Controlled Timepiece - Google Patents
Radio Controlled Timepiece Download PDFInfo
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- CN105404136A CN105404136A CN201510556909.XA CN201510556909A CN105404136A CN 105404136 A CN105404136 A CN 105404136A CN 201510556909 A CN201510556909 A CN 201510556909A CN 105404136 A CN105404136 A CN 105404136A
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Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/28—Satellite selection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/34—Power consumption
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/06—Decoding time data; Circuits therefor
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/08—Setting the time according to the time information carried or implied by the radio signal the radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB
Abstract
A radio controlled timepiece includes a GPS reception processing unit that searches for and captures a signal included in radio waves from a positioning satellite, demodulates and decodes the captured signal to acquire the data corresponding to acquisition target information in data transmitted from the positioning satellite, acquires the acquisition target information using the acquired data, holds a failure history related to acquisition of the data with respect to each captured signal, suspends acquisition of the data from a signal having a reception level determined to be at least equal to a predetermined reference level based on the failure history, and ends acquisition of the data when the number of signals from which the data is to be acquired after search for the signal is ended under a predetermined condition becomes smaller than the number of signals necessary in acquiring the acquisition target information.
Description
Technical field
The present invention relates to a kind of reception carrys out obtaining information radiowave timepiece from the electric wave of location satellite.
Background technology
In the past, there is the electric wave of a kind of receiving package containing date and time information, positional information to carry out the electronic clock (radiowave timepiece) of the correction of date and time, the setting in time zone etc.This action is carried out according to the movement of the user of radiowave timepiece, the process etc. of stipulated time, thus in radiowave timepiece, easily correct date and time is counted, and can show the date and time of the local time corresponding to the current location of user.
As one of information source sending the information relevant with date and time, position in the mode of electric wave from outside, there is the location satellite relevant with GNSS (GlobalNavigationSatelliteSystem: GLONASS (Global Navigation Satellite System)).As long as well then can receive in arbitrary corner in the whole world from the electric wave state of the sky of location satellite, therefore restrictive condition is few, is particularly preferably used in portable radiowave timepiece.
On the other hand, in the electric wave reception from location satellite, required load is much larger than the electrical load needed for the counting action carried out in electronic clock, display action usually.In portable radiowave timepiece, particularly wrist-watch, owing to being miniaturization, lightweight, therefore cannot easily use the power supply corresponding with heavy load, therefore, in the past, have developed and shorten the electric wave reception time from location satellite by various method and reduce the technology of electric power consumption.
But when merely arranging in limited time time of reception, the possibility that there is successful obtaining information also reduces this problem.Therefore, in Japanese documentation and Japanese Unexamined Patent Publication 2010-60456 publication, disclose following technology: change restriction time of reception according to the receiving intensity from location satellite, and when battery allowance is little, do not carry out the prolongation limiting time of reception.
But even if when receiving in order, also can cause due to temporary transient noise etc. may not successful obtaining information at short notice.On the other hand, when receiving situation difference, such as, though sometimes get information also can precision too low and have problems in actual applications.In these cases, the possibility of actual successful obtaining information is low compared with time of reception, and power consumption when obtaining information failure is easily wasted.
The present invention is a kind of radiowave timepiece that can obtain the information from location satellite more expeditiously.
Summary of the invention
In order to achieve the above object, the present invention is a kind of radiowave timepiece, it is characterized in that, possesses:
Capture unit, it is searched for and catches the signal from location satellite receiving and comprise in electric wave;
Satellite data acquisition unit, it carries out demodulation, decoding to the above-mentioned signal captured, and obtains data corresponding to obtaining object information in the transmission data from above-mentioned location satellite;
Information acquiring section, it uses the above-mentioned data got to obtain above-mentioned acquisition object information; And
Receive control part, it keeps the failed historical record relevant with the acquisition of above-mentioned data by the above-mentioned each signal captured, above-mentioned satellite data acquisition unit is made to stop obtaining the above-mentioned data becoming the signal of below predetermined datum-plane from the accepting state judged according to this failed historical record, when the quantity obtaining the signal of above-mentioned data after terminating the search of above-mentioned signal is in predefined conditions lower than the quantity obtained needed for above-mentioned acquisition object information, above-mentioned satellite data acquisition unit is made to terminate the acquisition of above-mentioned data.
Accompanying drawing explanation
Fig. 1 is the block diagram of the functional structure of the electronic clock representing embodiments of the present invention.
Fig. 2 A is the block diagram of the inner structure representing GPS Return Reception Dept..
Fig. 2 B is the block diagram of the inner structure of the control part representing GPS Return Reception Dept..
Fig. 3 is the process flow diagram of the control procedure representing the local time acquisition process that the GPS Return Reception Dept. by electronic clock of the first embodiment performs.
Fig. 4 represents that the local time of variation 1 obtains the process flow diagram of the control procedure of process.
Fig. 5 represents that the local time of variation 2 obtains the process flow diagram of the control procedure of process.
Fig. 6 is the block diagram of the functional structure of the electronic clock representing the second embodiment.
Fig. 7 is the process flow diagram of the control procedure representing the local time acquisition process that the GPS Return Reception Dept. by electronic clock of the second embodiment performs.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.
Fig. 1 is the block diagram of the functional structure of the electronic clock 1 representing embodiments of the present invention.
This electronic clock 1 can receive and utilize the radiowave timepiece of the electric wave from location satellite.
The electronic clock 1 of the first embodiment possesses in CPU41 (CentralProcessingUnit: central processing unit) (clock control portion), ROM42 (ReadOnlyMemory: ROM (read-only memory)), RAM43 (RandomAccessMemory: random access memory), oscillatory circuit 44, frequency dividing circuit 45, timing circuit 46, operating portion 47, standard wave acceptance division 48 and its antenna 49, GPS Return Reception Dept. 50 and its antenna 51, driving circuit 52, power supply unit 53, second hand 61, minute hand 62, hour hands 63, date wheel 64, function pointer 65, gear mechanism 71 ~ 74 and stepper motor 81 ~ 84 etc.Afterwards, also by second hand 61, minute hand 62, hour hands 63, date wheel 64 and function pointer 65 part or all concentrate be called pointer 61 ~ 65 etc.
CPU41 carries out various calculation process, and unifies to control to the molar behavior of electronic clock 1.The CPU41 pair of pointer action relevant with the display of date and time controls, and makes standard wave acceptance division 48 carry out action and obtain receive data and calculate date and time.In addition, CPU41 revises the date and time that timing circuit 46 counts according to the date and time data obtained.
ROM42 stores program 421, the setting data of the various controls performed by CPU41.The program relevant with the action control of various functional mode is such as comprised in program 421.
RAM43 provides the storage space of operation to CPU41, temporary storage data.
Oscillatory circuit 44 generates and exports constant-frequency signal.Oscillatory circuit 44 such as possesses crystal oscillator.
The frequency signal frequency division exported from oscillatory circuit 44 is that the frequency signal used by CPU41, timing circuit 46 exports by frequency dividing circuit 45.Also can be can change exported frequency setting according to the control signal from CPU41.
The fractional frequency signal inputted from frequency dividing circuit 45 carries out counting and counts current date and time thus representing that the initial value of fixed date and time is added by timing circuit 46.According to the control signal from CPU41, the date and time that this timing circuit 46 counts can be revised.
Operating portion 47 receives the input operation from user.Pushbutton switch, rotary switch is comprised in operating portion 47.Some in pushbutton switch is pressed or down state is removed or rotary switch is extracted and rotate or by when returning, will represent that the electric signal of each action outputs to CPU41 as look-at-me.
Standard wave acceptance division 48 uses antenna 49 to receive the electric wave (standard wave) of long-wave band, exports (TCO) carry out demodulation and output to CPU41 the time-ofday signals of the standard wave after Modulation and Amplitude Modulation.Also according to the transmission frequency from the standard wave sending station receiving object, the harmony frequency of standard wave acceptance division 48 to long-wave band is changed by the control of CPU41.In addition, standard wave acceptance division 48 carries out the various process for improving receiving sensitivity, simulating signal is carried out digitizing with the sample frequency of regulation and outputs to CPU41.
GPS Return Reception Dept. 50 uses antenna 51 to receive the electric wave of L1 frequency band (1.57542GHz) sent from location satellite, carries out demodulation, decoding and obtain date and time information, positional information to the signal (navigation information) from this location satellite.By the information got with the formatted output such as set according to NMEA-0182 (NationalMarineElectronicsAssociations: National Marine Electronics association) standard etc. to CPU41.GPS Return Reception Dept. 50 receives the information of this acquisition object, the setting relevant with output format etc. from CPU41 and stores.In addition, GPS Return Reception Dept. 50 stores the predicted orbit information of this location satellite got from location satellite, reads as required and can utilize when receiving.In addition, store in GPS Return Reception Dept. 50 for obtaining the time zone corresponding to specified position, the time zone of daylight saving time information correspondingly shows 502d.
Driving circuit 52 by from CPU41 input control signal, with pair stepper motor corresponding to this control signal 81 ~ 84 output drive signal and make this stepper motor 81 ~ 84 carry out rotary actuation on suitable opportunity.In driving circuit 52, can suitably adjust the pulsewidth of drive singal, driving voltage according to the setting inputted from CPU41.In addition, when being transfused to the control signal driven multiple stepper motor to apply heavy load during difference simultaneously, these drivings to be staggered with the slight gap do not overlapped each other and these stepper motors can be made successively to carry out rotary actuation opportunitys by driving circuit 52.
Power supply unit 53 supplies the electric power relevant with the action in each portion with assigned voltage.Power supply unit 53 possesses battery, such as uses removable coin shape dry cell as this battery.Or, also can use solar panel and 2 primary cells as battery.In addition, when exporting multiple different voltage from power supply unit 53, such as, can be set to and use Switching Power Supply etc. can be transformed to the voltage of expectation and the structure that exports.
Stepper motor 81 makes second hand 61 carry out spinning movement via the gear mechanism 71 of the arrangement as multiple gear.When making stepper motor 81 drive 1 time, second hand 61 rotates 6 degree in one step, is rotated a circle on dial plate by the action of 60 times of stepper motor 81.
Stepper motor 82 makes minute hand 62 and hour hands 63 carry out spinning movement via gear mechanism 72.Gear mechanism 72 is configured to make hour hands 63 and minute hand 62 to carry out the structure rotated linkedly, makes 1 degree and make 1/12 degree in rotary moving at every turn, hour hands 63 in rotary moving at every turn, minute hand 62.
Stepper motor 83 makes date wheel 64 carry out spinning movement via gear mechanism 73.Date wheel 64 does not limit especially, but (rear side) and pointer display dial plate are rotatably arranged abreast below the pointer display dial plate of electronic clock 1.Dial plate is provided with peristome, and on the other hand, in the mark being circumferentially provided with expression each day of 1 ~ 31 day that date wheel 64 is relative with this peristome, along with the spinning movement of date wheel 64, some marks expose from peristome.When driving one time to stepper motor 83, the angle that date wheel 64 step in rotary moving is suitable, produced the rotation of 360/31 degree by the in rotary moving of 150 steps, the data mark exposed from the peristome of dial plate changes 1 staggering amount.And, when date wheel 64 31 staggering amount in rotary moving, represent that the data mark on initial date exposes from peristome again.
Stepper motor 84 makes function pointer 65 carry out spinning movement via gear mechanism 74.Function pointer 65 does not limit especially, but, such as rotate around the turning axle different from second hand 61, minute hand 62, hour hands 63 and date wheel 64, the content beyond showing for date and time or the display of other kind.Gear mechanism 74 such as makes function pointer 65 rotate 6 degree relative to the once rotation of stepper motor 84.
Then, the electric wave reception of GPS Return Reception Dept. 50 from location satellite is described.
Fig. 2 A is the block diagram of the inner structure representing GPS Return Reception Dept. 50.
Fig. 2 B is the block diagram of the inner structure of the control part 502c representing GPS Return Reception Dept. 50.
GPS Return Reception Dept. 50 possesses the RF portion 501 (RadioFrequency: radio frequency) be connected with antenna 51 and the base band part 502 etc. be connected with RF portion 501.
RF portion 501 is amplified from the electric wave received by antenna 51 signal, and, be transformed to signal frequency (base band).RF portion 501 such as possesses LNA (LowNoiseAmplifier: low noise amplifier), BPF (BandPassFilter: bandpass filter), local oscillator, frequency mixer and IF enlarging section (IntermediateFrequency: intermediate frequency) etc., under supradyne manner (superheterodyne), be transformed to baseband signal round intermediate frequency.
Base band part 502 is searched for and is caught the signal of each location satellite from the signal being transformed to baseband signal, carries out demodulation, decoding and obtain the information of expectation to this signal captured.Base band part 502 possesses capture unit 502a, tracking portion 502b and control part 502c (information acquiring section 502c1, reception control part 502c2, judegment part 502c3) etc.Capture unit 502a applies to baseband signal the pseudo noise signal (C/A code) that sets the location satellite of captured object respectively successively and carries out anti-spread spectrum, calculates correlation, searches for thus and catch the signal from the location satellite relevant with this C/A code.Tracking portion 502b applies the location satellite captured by capture unit 502a successively C/A code with the phase place identified carries out demodulation, decoding to the navigation information of this location satellite, obtains data, namely relevant with the date and time comprised in subframe 1 ~ 3 information (comprising control information), predicted orbit information (ephemeris) needed for current location (acquisition object information).
The action of control part 502c to base band part 502 controls.Control part 502c possesses CPU (module CPU), RAM and storage part etc.Module CPU carry out the action of capture unit 502a and tracking portion 502b open closedown, as the action such as selection control of location satellite receiving object, and, carry out with the transmission of the data between CPU41 and receive relevant setting, control.In addition, module CPU uses date and time information, the predicted orbit information got by tracking portion 502b to calculate (acquisition) current location.RAM is for providing the volatile memory of operation storage space to module CPU.Store in storage part get from location satellite predicted orbit data (ephemeris, almanac), the reception historical record in past and with receive the relevant setting of object information, be read out as required and utilize.Capture unit 502a can make the search engine of multiple channel ch1 ~ chn (seizure handling part, n are such as 16) carry out signal search side by side.In addition, tracking portion 502b can make multiple channel ch1 ~ chm (m is such as 8) carry out side by side and the demodulation of signal, relevant action of decoding.When searching for the signal of 32 satellites side by side, every 16 satellites alternately carry out searching for respectively.
Control part 502c can make the action of capture unit 502a and tracking portion 502b separately carry out opening closedown.In addition, control part 502c can set the location satellite relevant with the signal of the object captured by capture unit 502a.Such as, control part 502c can by captured in capture unit 502a, by tracking portion 502b follow the tracks of in location satellite get rid of from captured object.In addition, control part 502c, according to the setting of the location satellite that to use the location satellite relevant with GPS and GLONASS still only to utilize relevant with location system simultaneously, can carry out the location satellite spread of captured object to two systems and then expand to Galileo (Galileo) or be reduced into the setting of a certain satellite.
In addition, control part 502c keeps predicted orbit information when location, when getting predicted orbit information in the reception, according to this predicted orbit information, such as the location satellite relevant with the signal captured and the signal that cannot receive on ground surface simultaneously, can also suitably it be got rid of from captured object.Further, when keeping synoptic sites information in advance, also according to this positional information and current date and time, the signal from the location satellite being in the position that can not receive can be got rid of from captured object.
Then, the location action in electronic clock 1 is described.
Signal from location satellite is carried out spread spectrum with the C/A code that each location satellite is intrinsic and carries out electric wave transmission.Thus, in capture unit 502a, calculate correlation to each C/A yardage, the C/A code high to correlation and its phase place are identified, catch the signal from the location satellite relevant with this C/A code thus.For the signal captured, C/A code and its phase place for this seizure continue to carry out the process relevant with demodulation code to it in tracking portion 502b.
When receiving the signal from the location satellite (gps satellite) relevant with GPS, about demodulated signal, the frame data in 30 seconds be made up of the subframe of 56 seconds units repeatedly 25 times (page).Wherein, by obtain in arbitrary page from first sub-frame data (subframe 1) to the 3rd sub-frame data (subframe 3), obtain the data relevant with satellite-orbit information with the date and time information needed for location.In three-dimensional positioning, need satellite-orbit information (satellite position) and the date and time information (opportunity) of 4 satellite amounts, but when not needing the information of short transverse, location hypothetically on surface, even 3 satellite (obtaining the quantity needed for gained object information) suitable satellite-orbit information and date and time information also can carry out location thus.
But, according to the configuration (coordination) different (such as the location satellite situation etc. point-blank of location) of the location satellite for location, in the two-dimensional surface in three dimensions or on ground surface, sometimes position cannot be determined accurately.As the parameter representing location precision according to this coordination, calculate DOP (DilutionofPrecision (dilution of precision) is P (Position: position) DOP more than 4 satellites, when the two-dimentional location of 3 satellites for H (Horizontal: level) DOP).The precision allowed suitably determines according to product, purposes.
In the electronic clock 1 of present embodiment, in GPS Return Reception Dept. 50, obtain the data of subframe 1 ~ 3 from minimum 3 location satellites and carry out location, the value of the DOP relevant with this location meets rated condition (below stipulated standard value), is judged as that this location result is correct result thus.
Fig. 3 is the process flow diagram of the control procedure of the control part 502c representing the local time acquisition process that the GPS Return Reception Dept. 50 by electronic clock 1 of present embodiment performs.
Such as according to detecting that the regulation input operation of user to operating portion 47 starts the acquisition process of this local time.Or, also automatically can start when meeting compulsory exercise condition.
When the local time obtains process beginning, control part 502c (module CPU) starts the action carrying out RF portion 501 and capture unit 502a, starts to carry out with the electric wave reception of L1 frequency band with from the relevant action (step S101) of the seizure of the signal of location satellite.Now, control part 502c starts to count catching the elapsed time after starting (catching the elapsed time).
Control part 502c differentiates whether catch the elapsed time exceeds set seizure time-out time (upper limit time) (step S102).When be determined as do not exceed catch time-out time (step S102: "No"), control part 502c differentiates the signal (step S103) whether again captured from location satellite.When be determined as capture (step S103: "Yes"), the demodulation of the navigation information that the location satellite that control part 502c makes tracking portion 502b start to capture with this is relevant, decoding activity, and make capture unit 502a terminate the seizure (step S104) of this signal.
Control part 502c differentiates that whether the quantity (seizure quantity) of the signal captured be more than predetermined setting quantity (specified quantity) (step S106).More than the minimum satellite number (3) of this setting quantity needed for location namely consider that the signal of the location satellite that the situation, the coordination that obtain navigation information failure after catching is undesirable is by the value of the possibility that captures in advance etc., usually, 4 ~ 8 such as 5 are set as.When be determined as capture setting quantity more than (step S106: "Yes"), control part 502c makes capture unit 502a terminate capturing motion, make capture unit 502a stop (step S121).Now, control part 502c starts to count the tracking elapsed time from the opportunity making seizure terminate.When being determined as the signal not capturing more than setting quantity (step S106: "No"), the process of control part 502c is transitioned into step S112.
Control part 502c differentiates whether follow the tracks of the elapsed time exceeds set tracking time-out time (step S122).When be determined as exceed follow the tracks of time-out time (step S122: "Yes"), the process of control part 502c makes process be transitioned into step S133 and terminates receiving action, terminate the local time obtain process.When be determined as do not exceed follow the tracks of time-out time (step S122: "No"), control part 502c differentiates the data (step S123) more than the location satellite of more than 3 whether getting the subframe 1 ~ 3 in navigation information in tracking portion 502b from the location satellite captured.
When be determined as do not get the data of subframe 1 ~ 3 from the location satellite of more than 3 (step S123: "No"), the process of control part 502c turns back to step S122.When be determined as get (step S123: "Yes"), then, control part 502c differentiates whether the location result got meets specified accuracy condition (step S127).Control part 502c differentiates whether the value of DOP is below stipulated standard value, when being determined as below reference value, i.e. location result and being more than specified accuracy (meeting stipulated standard) (step S127: "Yes"), control part 502c makes tracking portion 502b terminate tracking action and makes tracking portion 502b stop (step S128).Control part 502c, with reference to time zone correspondence table 502d, identifies time zone (step S129) according to the positional information got.Now, correct date and time and time-zone information are outputted to CPU41 with suitable opportunity by control part 502c, can revise the date and time of timing circuit 46 and shown local time.And control part 502c terminates local time acquisition process.
In the differentiation process of step S127, be determined as (step S127: "No") location result does not meet precision conditions, control part 502c differentiates the data (step S131) whether getting subframe 1 ~ 3 from the whole location satellites captured.When be determined as do not get, do not get the data of subframe 1 ~ 3 in the location satellite that namely captures (step S131: "No"), the process of control part 502c is transitioned into step S122.When be determined as from the whole location satellites captured, to get the data of subframe 1 ~ 3 (step S131: "Yes"), control part 502c terminates the reception process (step S133) relevant with whole location satellite, terminates local time acquisition process.
Be determined as when not capture new signal in the capturing motion of capture unit 502a (step S103: "No") in the process of step S103, control part 502c differentiates whether the quantity (seizure quantity) of the current location satellite captured is " 0 " (step S111).When be determined as catch quantity for " 0 " (step S111: "Yes"), the process of control part 502c is transitioned into step S102.When being determined as seizure quantity and being not " 0 " (step S111: "No"), the process of control part 502c is transitioned into step S112.
When being transitioned into the process of step S112 from the process of step S111 or step S106, control part 502c differentiates the data (step S112) whether getting subframe 1 ~ 3 in the location satellite of more than 3 from the location satellite captured at present.When being determined as the data not getting, namely catch lazy weight 3 satellites or subframe 1 ~ 3 and also not yet getting (step S112: "No"), the process of control part 502c is transitioned into step S102.
Be determined as in the differentiation process of step S112 when to get the data of subframe 1 ~ 3 from the location satellite of more than 3 (step S112: "Yes"), the process of control part 502c is transitioned into step S127.Now, control part 502c makes capture unit 502a terminate capturing motion.
Be determined as in the differentiation process of step S102 catch to catch under the state that quantity do not reach more than setting quantity the elapsed time exceed catch time-out time when (step S102: "Yes"), control part 502c differentiates whether capture the location satellite (step S109) of more than 3.When be determined as capture more than 3 (step S109: "Yes"), the process of control part 502c is transitioned into step S121.When be determined as do not capture more than 3 (less than 2) (step S109: "No"), the process of control part 502c is transitioned into step S133, terminate to receive (catch and follow the tracks of), the end local time obtains process.
[variation 1]
Then, illustrate that the local time in the electronic clock 1 of present embodiment obtains the variation 1 of process.
Fig. 4 represents that the local time of variation 1 obtains the process flow diagram of the control procedure of the control part 502c of process.
Obtain in process in this local time, the process that the local time of above-mentioned embodiment obtains the step S123 in process is split into step S123a, S123b, in addition, the process of step S112 is split into step S112a, S112b, and adds the process of step S124 ~ S126, S113, S114.Process beyond these process is identical, additional identical Reference numeral and detailed.
The seizure quantity being determined as location satellite in the differentiation process of step S111 not " 0 " (step S111: "No"), control part 502c differentiates to be whether the opportunity (step S112a) that each location satellite by capturing gets the data of subframe 1 ~ 3.That is, at this, after control part 502c differentiates the position identifying in navigation information in each location satellite, whether the reception period of (or, front once branch into "Yes" by the process of this step S112a after) subframe 1 ~ 3 all passes through.The order of this reception period is not limited to the order of subframe 1,2,3, such as, after receiving subframe 3, also can receive the subframe 1,2 in next frame.That is, catching opportunity by the forelock (opportunity starting to obtain data) according to signal, the data of a frame suitable (one-period is suitable) also can not from subframe 1.
When to be determined as in the arbitrary satellite captured be all not the opportunity of the data getting subframe 1 ~ 3 (step S112a: "No"), the process of control part 502c turns back to step S102.During the data receiver being determined as subframe 1 ~ 3 in a certain satellite when opportunity of whole processes (step S112a: "Yes"), control part 502c for as in the location satellite on this opportunity, obtain the location satellite of data failure of subframe 1 ~ 3, the reception number of times (failed historical record) of this location satellite is added " 1 " (initial value is " 0 ") (step S113).In addition, the tracking action that control part 502c makes is stipulated number (set upper limit number of times) with this reception number of times, (accepting state is below datum-plane) location satellite of such as more than 2 times is relevant stops (step S114).
Control part 502c differentiates whether the data acquisition of subframe 1 ~ 3 carries out (whether for obtaining more than the quantity needed for object information) (step S112b) according to the signal relevant with the location satellite of more than 3.When be determined as got by more than 3 (step S112b: "Yes"), the process of control part 502c is transitioned into step S127.When be determined as more than 3 do not get, namely lower than with (step S112b: "No") when quantity needed for location, the process of control part 502c turns back to step S102.
In addition, be determined as in the differentiation process of step S122 and follow the tracks of the elapsed time and do not exceed when following the tracks of time-out time (step S122: "No"), control part 502c differentiate be whether from the location satellite captured separately get opportunity (step S123a) of the data of subframe 1 ~ 3.Control part 502c differentiate the position of identifying in navigation information in the signal from each location satellite after the reception period of subframe 1 ~ 3 whether all pass through.
When to be determined as in the arbitrary satellite captured be all not the opportunity of the data getting subframe 1 ~ 3 (step S123a: "No"), the process of control part 502c turns back to step S122.When being determined as the opportunity being the data getting subframe 1 ~ 3 in a certain satellite (step S123a: "Yes"), control part 502c for as in the location satellite on this opportunity, obtain the location satellite of data failure of subframe 1 ~ 3, the reception number of times of this location satellite is added " 1 " (initial value is " 0 ") (step S124).In addition, the tracking action that control part 502c makes is stipulated number with this reception number of times, the location satellite of such as more than 2 times is relevant stops (step S125).
In addition, afterwards, in the differentiation process of step S131, in " all catching satellite ", the location satellite (being considered as not seizure from first) followed the tracks of and be stopped is not included in the process of step S114, S125.
Control part 502c differentiates whether the quantity of the location satellite of current tracking is less than 3 (step S126).When be determined as be less than 3 (step S126: "Yes"), the process of control part 502c is transitioned into step S133, terminate receiving action (step S133), terminate the local time obtain process.
When be determined as not be less than 3 (more than 3) (step S126: "No"), control part 502c differentiates that whether the data acquisition of subframe 1 ~ 3 is undertaken (step S123b) by the location satellite of more than 3.When be determined as got by more than 3 (step S123b: "Yes"), the process of control part 502c is transitioned into step S127.When be determined as do not got by more than 3 (step S123b: "No"), the process of control part 502c turns back to step S122.
[variation 2]
Fig. 5 represents that the local time obtains the process flow diagram of the control procedure of the control part 502c of the variation 2 of process.
Obtain in this local time in the variation 2 of process, also the process that process adds step S106, S115 is obtained to the local time of above-mentioned variation 1.Other contents processing is identical with processing procedure, adds identical Reference numeral and detailed to identical process.
In the process of step S104, when making tracking portion 502b restart the tracking action of the signal captured, the captured object satellite number that control part 502c departs from from captured object according to signal relevant with the location satellite of this tracing object in capture unit 502a and reduces, regulates (step S105) the search engine number of action.Such as, in the capture unit 502a possessing 16 search engines, 32 gps satellites are captured object, in capture unit 502a, carry out every 16 process of alternately searching for the signal of these 32 gps satellites respectively, but when capturing 2 gps satellites, control part 502c can change to and makes search engine stop and making every 15 settings of alternately searching for the signal of all the other 30 gps satellites respectively of 15 search engines.Then, the process of control part 502c is transitioned into step S106.
In addition, in the process of step S114, when make from receive number of times be the signal of the location satellite of more than stipulated number data acquisition stop time, this location satellite is got rid of (step S115) by control part 502c from the captured object that capture unit 502a catches.That is, be captured location satellite once signal obtain subframe 1 ~ 3 data failure and follow the tracks of action stop after, no longer search for.Then, the process of control part 502c is transitioned into step S112b.
As mentioned above, the electronic clock 1 of the first embodiment possesses: capture unit 502a, and it is searched for and catches the signal from location satellite receiving and comprise in electric wave; Tracking portion 502b, it carries out demodulation, decoding to the signal captured, and obtains the subframe 1 ~ 3 needed for location in the transmission data from location satellite; And control part 502c, control part 502c use the data of the subframe 1 ~ 3 got by tracking portion 502b to obtain current location (information acquiring section).Control part 502c keeps the failed historical record relevant with the acquisition of the data of subframe 1 ~ 3 by each signal captured, tracking portion 502b is made to stop obtaining from the accepting state judged according to this failed historical record the data of the subframe 1 ~ 3 being stipulated standard signal below horizontal, make under prescribed conditions in capture unit 502a signal search terminate after to obtain the signal of subframe 1 ~ 3 data due to above-mentioned stopping etc. quantity lower than 3 needed for location, make GPS Return Reception Dept. 50 terminate receiving action (reception control part).
Namely, only tracking time-out time is set in the action of tracking portion 502b, just with deviation catched opportunity by the forelock etc. independently, until this tracking time-out time is through continuing to carry out action, on the other hand, in this electronic clock 1, whether the reception deciding subframe 1 ~ 3 according to each location satellite is difficult, therefore according to the deviation that this catches opportunity by the forelock, the acquisition of whether fully estimation subframe 1 ~ 3 in tracking time-out time can be prejudged liberally relative to the signal of each location satellite and whether can carry out location in tracking time-out time.On the other hand, for the signal that can catch, according to the signal intensity received, S/N ratio etc., uniformly do not arrange and whether can be used in the relevant restriction of location, after the data of attempting once acquisition subframe 1 ~ 3, judge that above-mentioned acquisition is estimated, therefore, even if such as harsh also according to opportunity that is mixed into of burst noise, inferior by the situation that can obtain the data of subframe 1 ~ 3 decay opportunity etc. at short notice of the receiving intensity caused of decaying in signal intensity, this acquisition data can be effectively utilized.By this judgement, when location difficulty, more promptly make receiving action terminate, when reception is continued, can improve further and receive successful possibility.
Thus, the information that more can obtain expeditiously from location satellite compared with the past.
In addition, in control part 502c, when the precision of the current location got does not meet rated condition, differentiate the signal whether captured beyond the signal relevant with the data of the subframe 1 ~ 3 for this location, when being determined as capturing motion and not terminating or capture the signal beyond for the signal of location, tracking portion 502b is made to continue to obtain the data relevant with the signal that this captures, when capturing motion terminates and the data being determined as the subframe 1 ~ 3 got from the whole signals captured are used to location, GPS Return Reception Dept. 50 is stopped from the receiving action of location satellite reception electric wave.
Namely, exist than the signal that captures of other signal delay ground, when temporarily failing to obtain the signal of data of subframe 1 ~ 3 with other signal due to noise etc. roughly simultaneously, by the increase location satellite relevant with this signal, the coordination of location satellite changes, thus the precision of desired locations information is improved, on the other hand, even if when using the data of the subframe 1 ~ 3 all obtained from the signal captured also cannot obtain required precision, the change of the coordination produced along with the movement of the location satellite relevant with the signal captured cannot be expected at short notice.In addition, in only location action once, the possibility taken defeat produced along with the movement in action is larger, therefore, usually owing to not encouraging the movement in action, the possibility that the movement passing through thus to receive place captures at short notice from the signal of new location satellite is also low, even if therefore repeatedly carry out location action be also difficult to expectation quality raising.Thus, by promptly terminating to carry out the low action of the possibility of location more than the precision expected, the possibility of invalidly power consumption and time can be reduced.
In addition, control part 502c counts by the number of times of each signal captured to the data failure obtaining subframe 1 ~ 3 in tracking portion 502b, and the signal becoming more than the stipulated number preset according to the number of times of failure makes the data acquisition of subframe 1 ~ 3 stop.That is, not spended time and promptly abandoning in the reception of the signal of the location satellite of reception situation difference, only can carry out location according to the signal from location satellite being estimated as the data that can obtain subframe 1 ~ 3.Particularly, it, for being caused the signal that temporarily may receive difficulty by noise, decay etc., identifies and utilizes it or got rid of, quickly and reliably can carry out location thus by signal intensity exactly no matter receive.
In addition, the control part 502c signal that do not make capture unit 502a again search for the data acquisition of subframe 1 ~ 3 is stopped.As mentioned above, be assumed to be the situation of the acquisition difficulty that can not be changed to subframe 1 ~ 3 at short notice, therefore, it is possible to prevent the seizure of repeatedly this signal repeatedly and tracking and consume useless time, this situation of electric power.
When being captured the signal of setting quantity of more than the quantity needed for location by capture unit 502a, end signal is searched for, control part 502c got before the signal capturing this setting quantity from the location satellite of more than 3 subframe 1 ~ 3, use the data of this subframe 1 ~ 3 to carry out location.
Namely, in the past, there is following structure: catch the signal from the location satellite more fully counted than the satellite number needed for location and obtain data, reliably carry out location with high precision, on the other hand, even if when catching the signal less than the location satellite fully counted from this, also when location can be carried out, after carrying out a location, judge whether to use the current location data relevant with this location according to precision.Thus, under location likely successful situation, first location is carried out, therefore, usually when the setting quantity for location to be captured such as not location satellite and obtain the data of subframe 1 ~ 3 and precision as required obtains current location, promptly can obtain current location and reception process is terminated.
In addition, when start from capture unit 502a search for from location satellite signal through seizure time-out time, search is terminated, when until when capturing the signal from location satellites more than 3 needed for location on opportunity that this search terminates, obtained the data of subframe 1 ~ 3 by tracking portion 502b from this signal captured.
Thus, even if obtain the location satellite less than expecting the setting quantity used when usually carrying out location, when capturing the signal of MIN more than 3 points needed for location, by carrying out location, rise with making the acquisition success ratio of position data.
In addition, capture unit 502a possesses multiple channel, the signal from multiple location satellite is searched for side by side by the plurality of channel, the signal captured is got rid of from captured object, and regulates according to the channel number of number of signals to the signal for searching for this captured object of remaining captured object.
Thus, whole channel and wastes power invalidly can not be opened when the number of signals that will search for reduces, can the low capturing motion of carrying out signal of high-level efficiency.
[the second embodiment]
Then, the electronic clock of the second embodiment is described.
Fig. 6 is the block diagram of the functional structure of the electronic clock 1a representing the second embodiment.
Only add measurement unit 54 this point, this electronic clock 1a is different from the electronic clock 1 of the first embodiment.About structure in addition, add identical Reference numeral and omit the description.
Measurement unit 54 measures for the posture to electronic clock 1a, motion state etc.Measurement unit 54 possesses acceleration transducer 541 and aspect sensor 542 etc.
Acceleration transducer 541 is 3 axle sensors for measuring the motion state of electronic clock 1a, such as to 2 on the display surface (surfaces of revolution of pointer 61 ~ 65) of electronic clock 1a axially and measure with the acceleration of this display surface vertical direction.The sensor that make use of piezoresistance is such as used in acceleration transducer 541.
Aspect sensor 542 be for electronic clock 1a posture (towards) sensor that measures, the corner of magnetic north is measured.The sensor that make use of magnetoresistive element (MR element) is such as used in aspect sensor 542.
In ROM42, store the determining program of the motion state for judging electronic clock 1a, CPU41 (amount of movement calculating part 411), by performing this determining program, can judge the motion state of electronic clock 1a.Such as, direction (vertical direction) perpendicular to the ground is identified according to the acceleration of gravity measured by acceleration transducer 541, therefore the moving direction etc. in this surface level obtained according to the acceleration change in the acceleration change of vertical direction, surface level and being measured by aspect sensor 542, judges the motion state of user, mobile status.In addition, when the motion mainly produced to the movement of horizontal direction along with bicycle, vehicle etc., (also can be general calculating) can be calculated to the speed of horizontal direction and amount of movement (variable quantity of position) according to the change of this horizontal acceleration.On the other hand, when the motion produced to the periodic accelerations variation of vertical direction and the variation of the periodic accelerations due to swinging arm mainly in the display surface of clock along with walking etc., such as the mobile step number of the installation personnel of the electronic clock 1a corresponding to the cycle that this acceleration changes is counted, measure the moving direction that obtains can calculate amount of movement according to average stride amount and by aspect sensor 542.As the acceleration change pattern in the vertical direction relevant with the differentiation of ambulatory status and swinging arm face, known acceleration change pattern can be utilized.
Then, the location action in the electronic clock 1a of present embodiment is described.
In the electronic clock 1a of present embodiment, according to the measurement of above-mentioned measurement unit 54, amount of movement is measured in location action, location is unsuccessful after capturing motion terminates or when being judged as that the installation personnel of electronic clock 1a has carried out movement, namely location place changes, again carry out location.
Fig. 7 is the process flow diagram of the control procedure of the CPU41 representing the local time acquisition process that the GPS Return Reception Dept. 50 by electronic clock 1a of present embodiment performs.
Obtain in process in this local time, the process of the step S121 that local time of the variation 2 in the electronic clock 1 of above-mentioned first embodiment obtains in process be replaced by step S121a process and added step S130, S132 process this point different.Identical Reference numeral is added and detailed to identical process.
When branching into "Yes" in the differentiation process in step S106 or step S109, control part 502c makes the capturing motion of the signal from location satellite terminate, and CPU41 is transmitted control signal, according to the measurement data of measurement unit 54, carry out the calculating (step S121a) of the amount of movement from this opportunity.
The location satellite number be determined as in the differentiation process of step S126 in current tracking is less than 3 (step S126: "Yes"), control part 502c differentiate in step S121 capturing motion terminate after the position of electronic clock 1a whether move (step S130).Specifically, control part 502c obtain by measurement unit 54 measure obtain and calculated by CPU41, relative movement distance from the position at the end of capturing motion, differentiate whether this relative movement distance is more than the predetermined distance (reference range) preset.When being determined as more than predetermined distance (step S130: "Yes"), the process of portion 502c processed is back to step S101, again starts to carry out seizure process.When being determined as not more than predetermined distance (step S130: "No"), the process of control part 502c is transitioned into step S133, and control part 502c makes receiving action terminate (step S133).
In addition, when branching into "Yes" in the process in step S131, control part 502c differentiates whether the position of electronic clock 1a moves (step S132) after the process of step S121a.Be determined as just in the case of movement (step S132: "Yes"), the process of control part 502c is transitioned into step S101, when being determined as not mobile (step S132: "No"), the process of control part 502c is transitioned into step S133.
As mentioned above, the electronic clock 1a of the second embodiment possesses the measurement unit 54 measured motion state, CPU41 calculates the variable quantity (amount of movement calculating part) of position according to the measurement data of measurement unit 54, stop capture unit 502a to after the search of signal under prescribed conditions, location variation till the position obtaining current location failure from the position making this search stop be stipulated standard apart from above, make capture unit 502a search start signal again.
Like this, merely can not make the acquisition time prolongation of the search of signal, data, even if take defeat once, only when the receiving position of electric wave during this period moves and is likely in different reception environments, again carry out retrieving, catching and receiving action is continued, the acquisition possibility of current location can be improved thus expeditiously.
In addition, the present invention is not limited to above-mentioned embodiment, can carry out various change.
Such as in the above-described embodiment, obtain the signal received from 3 location satellites in process in the local time and also can carry out location, but in common location process, also need elevation information, therefore also only when receiving the signal of location satellite of more than 4, can calculate, exporting current location information.
In addition, in the above-described embodiment, describe the situation of the data receiving subframe 1 ~ 3 from gps satellite, but when receiving the data from other location satellite, need to obtain required data area according to the form of the navigation information of this location satellite.In addition, the time-out time of the seizure about corresponding to this form, tracking can also be set.
In addition, in the above-described embodiment, merely the number of times that takes defeat of the data of the data needed for GPS location and subframe 1 ~ 3 is counted, when the frequency of failure exceeds stipulated number, stop obtaining (tracking) data from this signal, but between the signal that the signal formerly captured and delay capture, the reception number of times of subframe 1 ~ 3 data produces larger difference, be not only the simple frequency of failure, during reception after second time, tracking also can be made to stop when the failure that failed frequency such as receives exceeds 50%.
In addition, in the above-described embodiment, the data being set to the one-period that gets suitable start to be not limited to subframe 1, but except from whole subframe 1, when can also only roughly side by side receive in the scope of the propagation delay based on the distance from each location satellite, calculate current location.
On the other hand, in a location process (local time obtain process), also can use according to location satellite is different that the data of different frames calculate current location.In this case, even if when the number of times that takes defeat of subframe 1 ~ 3 reaches set point number, also can all get from different frames until the data of subframe 1 ~ 3 required when this reaches time, use the data of these subframes 1 ~ 3 to come for location.Further, afterwards when again calculating current location because precision is not enough, cannot utilize from the data of following the tracks of the subframe 1 ~ 3 got the signal of stopping.
In addition, in the above-described embodiment, at the reception period of the data of subframe 1 ~ 3 through afterwards, concentrate and differentiate in the reception data of this subframe 1 ~ 3, whether there is the failed part of acquisition, number of times will be received be added " 1 " and proceed the reception of next cycle, but can be also following process: differentiate failure in real time, in one-period repeatedly failure, do not carry out receiving the additive operation of number of times after second time.Or, also can be in receive number of times situation once fewer than stipulated number time point about this signal transition to real-time differentiation, at the time point of the failure detecting the data acquisition in subframe 1 ~ 3, the tracking of this signal is stopped immediately.
In addition, in the above-described embodiment, describe the situation obtaining ephemeris in order to carry out location to obtain current location information, but when the positional precision of location is poor also passable, use almanac also can calculate approximate location, therefore, when the almanac data of the location satellite in seizure can be received by some location satellites, also this almanac data can be used.
In addition, in the above-described embodiment, DOP is used as precision index, but precision index is not limited thereto, such as when the value of the speed calculated, height is arranged the upper limit, lower limit reference value and depart from from the scope represented by reference value, also can be judged as that precision is not enough.
In addition, in the above-described embodiment, uniformly determine precision conditions, but also can by for catch get in process position, do not use the precision conditions of the whole signal captured and the position got be set as than for catch terminate after get position, use the whole signal acquisitions captured to arrive the precision conditions of position strict.
In this case, following process can be set to: obtain in the differentiation process of step S112, S112b subframes 1 ~ 3 more than 3 satellites data and after being transitioned into the process of step S127, when be determined as do not meet precision conditions, do not make process be transitioned into step S131, and be back to the process of step S102.
In addition, in this second embodiment, use acceleration transducer 541 and aspect sensor 542 to carry out the judgement of motion state and the measurement of displacement, but also can use the horizon sensor etc. of other sensor such as display surface of electronic clock 1a.
In addition, in this second embodiment, use the relative movement distance from the end of catching to differentiate and whether again start search, but when correctly to estimate moving direction and cumulative motion-vector difficulty, also merely only the accumulated value of amount of movement (scalar) can be set to the benchmark (reference range) of judgement.In this case, the result of a series of movement is, in the situation etc. turning back to same place, relative movement distance is little sometimes, but in the key element making satellite waves decay, such as open rainproof door-plate, special window etc. in indoor and situation about returning is inferior, can improve reception environment.
In addition, in above-mentioned variation 1 ~ 3 and the second embodiment, structure and process are added successively to the structure of the first embodiment and processing procedure and are illustrated, but these add structure, process and individually or in possible scope also can suitably combine and use.Such as obtain in process in the local time of variation 1, following process can be set to: the not process of setting steps S131, when branching into "No" in the differentiation process of step S127, directly turn back to the process of step S122.
In addition, concrete structure, contents processing, its process of illustrating in the above-described embodiment can suitably be changed without departing from the scope of spirit of the present invention.
Describe several embodiment of the present invention, but scope of the present invention is not limited to above-mentioned embodiment, comprises the invention scope described in claims and equivalent scope thereof.
Claims (10)
1. a radiowave timepiece, is characterized in that, possesses:
Capture unit, it is searched for and catches the signal from location satellite receiving and comprise in electric wave;
Satellite data acquisition unit, it carries out demodulation, decoding to the above-mentioned signal captured, and obtains data corresponding to obtaining object information in the transmission data from above-mentioned location satellite;
Information acquiring section, it uses the above-mentioned data got to obtain above-mentioned acquisition object information; And
Receive control part, it keeps the failed historical record relevant with the acquisition of above-mentioned data by the above-mentioned each signal captured, above-mentioned satellite data acquisition unit is made to stop obtaining the above-mentioned data becoming the signal of below predetermined datum-plane from the accepting state judged according to this failed historical record, when the quantity obtaining the signal of above-mentioned data after terminating the search of above-mentioned signal is in predefined conditions lower than the quantity obtained needed for above-mentioned acquisition object information, above-mentioned satellite data acquisition unit is made to terminate the acquisition of above-mentioned data.
2. radiowave timepiece according to claim 1, is characterized in that,
Above-mentioned radiowave timepiece possesses: judegment part, and when the precision of the above-mentioned acquisition object information got does not meet predetermined benchmark, this judegment part differentiates the signal whether captured beyond signal that the above-mentioned data for obtaining this acquisition object information relate to,
Above-mentioned reception control part is not when the search being determined as above-mentioned signal terminates or capture the signal beyond the signal for obtaining above-mentioned acquisition object information, continue to obtain above-mentioned data, when the search being determined as above-mentioned signal terminate and from the whole signal acquisitions captured to above-mentioned data acquisition object information above-mentioned for acquisition, terminate the acquisition of above-mentioned data.
3. radiowave timepiece according to claim 1, is characterized in that,
Above-mentioned reception control part counts as above-mentioned failed historical record obtaining the number of times of above-mentioned data failure, and the number of times stopping obtaining from this failure becomes the above-mentioned data of the above-mentioned signal of more than the predetermined upper limit number of times preset.
4. radiowave timepiece according to claim 2, is characterized in that,
Above-mentioned reception control part counts as above-mentioned failed historical record obtaining the number of times of above-mentioned data failure, and the number of times stopping obtaining from this failure becomes the above-mentioned data of the above-mentioned signal of more than the predetermined upper limit number of times preset.
5. radiowave timepiece according to claim 1, is characterized in that,
Above-mentioned reception control unit does not make above-mentioned capture unit again search for and stopped the signal obtaining above-mentioned data.
6. radiowave timepiece according to claim 2, is characterized in that,
Above-mentioned reception control unit does not make above-mentioned capture unit again search for and stopped the signal obtaining above-mentioned data.
7. radiowave timepiece according to claim 1, is characterized in that,
When being captured the signal of predetermined quantity of more than the quantity obtained needed for above-mentioned acquisition object information by above-mentioned capture unit, above-mentioned reception control unit terminates to search for above-mentioned signal,
When getting above-mentioned data from the signal more than quantity obtained needed for above-mentioned acquisition object information before the signal capturing above-mentioned predetermined quantity, above-mentioned information acquisition unit uses these data to obtain above-mentioned acquisition object information.
8. radiowave timepiece according to claim 1, is characterized in that,
When to start to search for above-mentioned signal through predetermined upper limit time from above-mentioned capture unit, above-mentioned reception control unit terminates this search,
When until when capturing the signal of more than the quantity obtained needed for above-mentioned acquisition object information this opportunity terminated, above-mentioned reception control unit obtains above-mentioned data by above-mentioned satellite data acquiring unit from the signal that this captures.
9. the radiowave timepiece according to any one of claim 1 ~ 8, is characterized in that,
Above-mentioned capture unit possesses multiple seizure handling part, the signal from multiple location satellite is searched for side by side by the plurality of seizure handling part, the signal captured is got rid of from captured object, and regulates according to the quantity of number of signals to the above-mentioned seizure handling part of the signal for searching for this captured object of remaining captured object.
10. radiowave timepiece according to claim 1, is characterized in that,
This radiowave timepiece possesses:
Measuring means, it measures motion state; And
Transfer length calculation section, it calculates the variable quantity of position according to the measurement data of above-mentioned measuring means,
Stop search after above-mentioned signal under above-mentioned predetermined condition, when the above-mentioned variable quantity from stopping the position of this search to obtaining the position of above-mentioned acquisition object information failure is more than predetermined reference range, above-mentioned reception control unit makes above-mentioned capture unit again start above-mentioned search.
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| JP2014181024A JP6036770B2 (en) | 2014-09-05 | 2014-09-05 | Radio clock |
| JP2014-181024 | 2014-09-05 |
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| CN105404136B CN105404136B (en) | 2018-03-06 |
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| CN201510556909.XA Active CN105404136B (en) | 2014-09-05 | 2015-09-02 | Radiowave timepiece |
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| US (2) | US9405276B2 (en) |
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| CN110244330A (en) * | 2018-03-07 | 2019-09-17 | 卡西欧计算机株式会社 | Satellite radio receiver, electronic clock and position control method |
| CN110244330B (en) * | 2018-03-07 | 2023-05-02 | 卡西欧计算机株式会社 | Satellite radio wave receiving device, electronic clock, and positioning control method |
| CN110837221A (en) * | 2019-11-27 | 2020-02-25 | 深圳市力合微电子股份有限公司 | Method for effectively improving time service reliability and continuity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105404136B (en) | 2018-03-06 |
| US20160070240A1 (en) | 2016-03-10 |
| JP6036770B2 (en) | 2016-11-30 |
| US9405276B2 (en) | 2016-08-02 |
| JP2016057070A (en) | 2016-04-21 |
| US20160299476A1 (en) | 2016-10-13 |
| US9501045B2 (en) | 2016-11-22 |
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